//You may also set any config parameters via the environment variables listed.
{
//  "server_type":"freeswitch",                            // env:"SERVER_TYPE" default:"freeswitch"
//  "amqp_uri":"amqp://guest:guest@localhost:5672",        // env:"AMQP_URI" default:"amqp://guest:guest@localhost:5672"
//  "amqp_exchange":"call_shield",                         // env:"AMQP_EXCH" default:"call_shield"
//  "amqp_exchange_type":"topic",                          // env:"AMQP_EXCH_TYPE" default:"topic"
//  "amqp_sub_routing_key":"",                             // env:"AMQP_SUB_ROUTING_KEY" default:"call_shield.{server_type}.firewall.*"
//  "amqp_pub_routing_key":"call_shield.test",             // env:"AMQP_PUB_ROUTING_KEY" default:"call_shield.test"
//  "amqp_direct_routing_key":"",                          // env:"AMQP_DIRECT_ROUTING_KEY" default:"call_shield.{hostname}.*.*"
//  "amqp_workers":4,                                      // env:"AMQP_WORKERS" default:"4"
//  "pub_message_file":"/tmp/message.json",                // env:"PUB_MSG_FILE" default:"/tmp/message.json"
//  "ports":"11000/udp,11000,11001/tcp,16384-32768/udp",   // env:"PORTS" default:"11000/udp,11000,11001/tcp,16384-32768/udp"
//  "cache_timeout_sec":10800,                             // env:"CACHE_TIMEOUT" default:"43200" (12hr)
//  "firewall_type":"firewalld",                           // env:"FIREWALL_ZONE" default:"firewalld"
//  "firewall_zone":"SIPFS",                               // env:"FIREWALL_ZONE" default:"SIPFS"
//  "log_file":"/var/log/kazoo_firewall_agent.log",        // env:"LOG_FILE" default:"/var/log/kazoo_firewall_agent.log"
//  "log_level":5                                          // env:"LOG_LEVEL" default:"5"
}